4-22mm Hex Shank Step Cone Drill Bit HSS Titanium Coated Hole Cutter
$12.99
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Specification: Material: High speed steel 4241; Size: 4-22 mm (10 Setps: 6,8,10,12,14,16,18,20 22mm); Shank: 6mm(dia),25mm(L); Total: 75mm(L). Features: - The ladder of its unique structure, a bit can open a variety of specifications of aperture. - Do not need to use center punch, compared with the ordinary twist drill is not easy to be broken. - Deburring, chamfering, elliptic hole enlargement, twist drill, the function of them was unable,but it is possible. - The use of tools: drill, bench drill.Work while water cooling, can effectively extend the service life of drill bit, recommend drilling rate of 250-250 RPM. Package Included: 1 x Step Drill
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